Sensitivity of ozone concentrations to diurnal variations of surface emissions in Mexico City: A WRF/Chem modeling study |
| |
| Authors: | Zhuming Ying Xuexi Tie Guohui Li |
| |
| Institution: | 1. York University, Toronto, Canada;2. National Center for Atmospheric Research, Boulder, CO, USA;3. Department of Atmospheric Sciences, Texas A&M, USA;1. School of Atmospheric Sciences, Nanjing University, Nanjing, 210093, China;2. School of Environmental Sciences and Engineering, Sun Yat-sen University, Guangzhou, 510275, China;1. University of Houston, Department of Earth and Atmospheric Science, 4800 Calhoun Rd, Houston, TX 77204-5007, United States;2. Universidade Federal de Pelotas, Faculdade de Meteorologia, Pelotas, RS, Brazil;1. Yangtze River Delta Center for Environmental Meteorology Prediction and Warning, Shanghai 200030, PR China;2. Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Service, Shanghai 200030, PR China;1. Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27606, USA;2. Collaborative Innovation Center for Regional Environmental Quality, Beijing 100084, China;3. Department of Environmental Engineering, Hebei University of Engineering, Handan, Hebei 056038, China;4. Center for Earth System Science, Tsinghua University, Beijing 100084, China;5. The School of Environment, Tsinghua University, Beijing 100084, China;1. Beijing Weather Modification Office, Beijing 100089, China;2. Key Laboratory of Aerosol Science and Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710049, China;3. National Center for Atmospheric Research, Boulder, CO, USA;1. Ricerca sul Sistema Energetico (RSE S.p.A.), via Rubattino 54, Milano, Italy;2. Center of Excellence “SPACE-SI”, A?ker?eva 12, Ljubljana, Slovenia;3. University of Ljubljana, Faculty of Mathematics and Physics, Jadranska 19, Ljubljana, Slovenia;4. Department of Physical and Chemical Sciences, Center of Excellence for the Forecast of Severe Weather (CETEMPS), University of L''Aquila, L''Aquila, Italy;5. Karlsruher Institut für Technologie (KIT), IMK-IFU, Kreuzeckbahnstr. 19, 82467 Garmisch-Partenkirchen, Germany;6. Zentralanstalt für Meteorologie und Geodynamik, ZAMG, Hohe Warte 38, 1190 Vienna, Austria;7. Environmental Software and Modelling Group, Computer Science School – Technical University of Madrid, Campus de Montegancedo, Boadilla del Monte-28660, Madrid, Spain;8. NOAA Earth System Research Laboratory, Global System Division, 325 Broadway, Boulder, CO, USA |
| |
| Abstract: | Sensitivity of ozone (O3) concentrations in the Mexico City area to diurnal variations of surface air pollutant emissions is investigated using the WRF/Chem model. Our analysis shows that diurnal variations of nitrogen oxides (NOx = NO + NO2) and volatile organic compound (VOC) emissions play an important role in controlling the O3 concentrations in the Mexico City area. The contributions of NOx and VOC emissions to daytime O3 concentrations are very sensitive to the morning emissions of NOx and VOCs. Increase in morning NOx emissions leads to decrease in daytime O3 concentrations as well as the afternoon O3 maximum, while increase in morning VOC emissions tends to increase in O3 concentrations in late morning and early afternoon, indicating that O3 production in Mexico City is under VOC-limited regime. It is also found that the nighttime O3 is independent of VOCs, but is sensitive to NOx. The emissions of VOCs during other periods (early morning, evening, and night) have only small impacts on O3 concentrations, while the emissions of NOx have important impacts on O3 concentrations in the evening and the early morning.This study suggests that shifting emission pattern, while keeping the total emissions unchanged, has important impacts on air quality. For example, delaying the morning emission peak from 8 am to 10 am significantly reduced the morning peaks of NOx and VOCs, as well as the afternoon O3 maxima. It suggests that without reduction of total emission, the daytime O3 concentrations can be significantly reduced by changing the diurnal variations of the emissions of O3 precursors. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
